The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2001
Filed:
Dec. 21, 1998
Tadahito Nobori, Kanagawa, JP;
Takaomi Hayashi, Kanagawa, JP;
Katsuhiko Funaki, Kanagawa, JP;
Atsushi Shibahara, Kanagawa, JP;
Isao Hara, Kanagawa, JP;
Shinji Kiyono, Kanagawa, JP;
Kazumi Mizutani, Kanagawa, JP;
Usaji Takaki, Kanagawa, JP;
Mitsui Chemicals, Inc., , JP;
Abstract
The compound [tris(dimethylamino)phosphonioamino]tris[tris(dimethylamino)phosphoranylideneamino]phosphonium dichloride can be prepared by contacting hydrogen chloride with tetrakis[tris(dimethylamino)phosphoranylideneamino]phosphonium chloride. The phosphonium dichloride compound can be used in a process wherein it is brought into contact with an OH,-form ion exchange resin to prepare tetrakis[tris(dimethylamino)phosphoranylideneamino]phosphonium hydroxide. Separate processes for separating or isolating the phosphonium chloride compound or isolating the phosphonium hydroxide compound from feed solutions wherein an extraction step is used are also set forth.